<template>
  <div>
    <el-upload
      :action="uploadUrl"
      :before-upload="handleBeforeUpload"
      :on-success="handleUploadSuccess"
      :on-error="handleUploadError"
      name="file"
      :show-file-list="false"
      :headers="headers"
      style="display: none"
      ref="upload"
      v-if="this.type == 'url'"
    >
    </el-upload>
    <div class="editor" ref="editor" :style="styles"></div>
  </div>
</template>

<script>
import Quill from 'quill'
import 'quill/dist/quill.core.css'
import 'quill/dist/quill.snow.css'
import 'quill/dist/quill.bubble.css'
import { getToken } from '@/utils/auth'

export default {
    name: 'Editor',
  props: {
    /* 编辑器的内容 */
    value: {
      type: String,
      default: '',
    },
    /* 高度 */
    height: {
      type: Number,
      default: null,
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: null,
    },
    /* 只读 */
    readOnly: {
      type: Boolean,
      default: false,
    },
    /* 显示工具条 */
    showToolbar: {
      type: Boolean,
      default: true,
    },
    // 上传文件大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
    /* 类型（base64格式、url格式） */
    type: {
      type: String,
      default: 'url',
    },
    /* 是否显示自定义的toolBar */
    isShowCustomToolBar: {
      type: Boolean,
      default: false,
    },

  },
  data() {
    return {
      // uploadUrl: process.env.VUE_APP_BASE_API + "/common/upload", // 上传的图片服务器地址
      uploadUrl: process.env.VUE_APP_BASE_API + '/system/user/profile/uploadActivity', // 上传的图片服务器地址
      headers: {
        Authorization: 'Bearer ' + getToken(),
      },
      Quill: null,
      currentValue: '',
      options: {
        theme: 'snow',
        bounds: document.body,
        debug: 'warn',
        modules: {
          // 工具栏配置
          // toolbar: [
          //   ['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
          //   ['blockquote', 'code-block'], // 引用  代码块
          //   [{ list: 'ordered' }, { list: 'bullet' }], // 有序、无序列表
          //   [{ indent: '-1' }, { indent: '+1' }], // 缩进
          //   [{ size: ['small', false, 'large', 'huge'] }], // 字体大小
          //   [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
          //   [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
          //   [{ align: [] }], // 对齐方式
          //   ['clean'], // 清除文本格式
          //   ['image'], //图片
          //   ['spaceBar'],//空格
          // ],
          toolbar:{
            container:[
              ['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
              ['blockquote', 'code-block'], // 引用  代码块
              [{ list: 'ordered' }, { list: 'bullet' }], // 有序、无序列表
              [{ indent: '-1' }, { indent: '+1' }], // 缩进
              [{ size: ['small', false, 'large', 'huge'] }], // 字体大小
              [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
              [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
              [{ align: [] }], // 对齐方式
              ['clean'], // 清除文本格式
              ['image'], //图片
              ['spaceBar'],//空格
              ['changeLine'],//换行
            ],
            handlers:{
              'spaceBar':()=>{
                  this.handleSpaceBar()
              },
              'changeLine':()=>{
                this.handleChangeLine()
              }
            }
          }
        },
        placeholder: '请输入内容',
        readOnly: this.readOnly
      },
    }
  },
  computed: {
    styles() {
      let style = {}
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`
      }
      if (this.height) {
        style.height = `${this.height}px`
      }
      return style
    },
  },
  watch: {
    value: {
      handler(val) {
        if (val !== this.currentValue) {
          this.currentValue = val === null ? '' : val
          if (this.Quill) {
            this.Quill.pasteHTML(this.currentValue)
          }
        }
      },
      immediate: true,
    },
  },
  mounted() {
    this.init();
    this.$bus.$on('addTag',(item)=>{
      let quill = this.Quill;
      let text = `[${item.itemValue}]`
      // 保存当前光标位置
      let range = quill.getSelection(true);
      quill.insertEmbed(range.index,'customTag',{text:text, id_key:item.placeholder});
      quill.focus()
      quill.update()

    })
  },

  beforeDestroy() {
    this.Quill = null;
    // 销毁对应自定义事件
    this.$bus.$off('addTag');
  },
  methods: {
    init() {
      const editor = this.$refs.editor
      if(!this.showToolbar){
        this.options.modules.toolbar=[]
      }
      if (this.readOnly){
        this.Quill = new Quill(editor, {modules:{toolbar:false}})
        this.Quill.enable(false);
      }else {
        this.Quill = new Quill(editor, this.options)
        this.Quill.enable(true);
      }

      // 如果设置了上传地址则自定义图片上传事件
      if (this.type == 'url') {
        let toolbar = this.Quill.getModule('toolbar')
        toolbar.addHandler('image', (value) => {
          this.uploadType = 'image'
          if (value) {
            !this.readOnly && this.$refs.upload.$children[0].$refs.input.click()
          } else {
            this.quill.format('image', false)
          }
        })
      }
      this.Quill.pasteHTML(this.currentValue)
      this.Quill.on('text-change', (delta, oldDelta, source) => {
        const html = this.$refs.editor.children[0].innerHTML
        const text = this.Quill.getText()
        const quill = this.Quill
        this.currentValue = html
        this.$emit('input', html)
        this.$emit('on-change', { html, text, quill })
      })
      this.Quill.on('text-change', (delta, oldDelta, source) => {
        this.$emit('on-text-change', delta, oldDelta, source)
      })
      this.Quill.on('selection-change', (range, oldRange, source) => {
        this.$emit('on-selection-change', range, oldRange, source)
      })
      this.Quill.on('editor-change', (eventName, ...args) => {
        this.$emit('on-editor-change', eventName, ...args)
      })

      this.onEditorReady();
      this.customSpanBlot();

    },
    onEditorReady() {
      document.querySelector('.ql-formats .ql-spaceBar').innerText = '空';
      document.querySelector('.ql-formats .ql-changeLine').innerText = '换';
    },
    // 点击了自定义的spaceBar
    handleSpaceBar(){
      let quill = this.Quill;
      let text = `[空格]`
      // 保存当前光标位置
      let range = quill.getSelection(true);
      quill.insertEmbed(range.index,'customTag',{text:text, id_key:'space'});
      quill.focus()
      quill.update()
    },
    handleChangeLine(){
      let quill = this.Quill;
      let text = `[换行]`
      // 保存当前光标位置
      let range = quill.getSelection(true);
      quill.insertEmbed(range.index,'customTag',{text:text, id_key:'changeLine'});
      quill.focus()
      quill.update()
    },

    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize
        if (!isLt) {
          this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`)
          return false
        }
      }
      // const formdata = new FormData()
      // formdata.append('avatarfile', file)
      return true
    },

    handleUploadSuccess(res, file) {
      // 获取富文本组件实例
      let quill = this.Quill
      // 如果上传成功
      if (res.code == 200) {
        // 获取光标所在位置
        let length = quill.getSelection().index
        // 插入图片  res.url为服务器返回的图片地址
        quill.insertEmbed(
          length,
          'image',
          this.getImgUrl(res.imgUrl)
          // process.env.VUE_APP_BASE_API + res.fileName
        )
        // 调整光标到最后
        quill.setSelection(length + 1)
      } else {
        this.$message.error('图片插入失败')
      }
    },
    handleUploadError() {
      this.$message.error('图片插入失败')
    },

    // 自定义扩展插入
    customSpanBlot() {
      const Embed = Quill.import("blots/embed")
      class CustomSpanBlot extends Embed  {
        static create(value) {
          let node = super.create();
          console.log('node------', node);
          node.innerHTML = value.text
          node.setAttribute('id_key', value.id_key);
          node.setAttribute('contenteditable', false);
          node.setAttribute('class', 'tagSpan');
          node.setAttribute('style', 'color:#FF1823;text-decoration: none;display: inline-block;font-style: normal;background-color: #fff;margin: 0 2px;');
          return node;
        }
        static value(node) {
          return {
            id_key: node.getAttribute('id_key'),
            text: node.innerHTML.trim()
          };
        }
      }
      CustomSpanBlot.blotName = 'customTag';
      CustomSpanBlot.tagName = 'span';
      CustomSpanBlot.className = 'tagSpan';
      Quill.register(CustomSpanBlot);
    }

  },
}
</script>

<style>
.editor,
.ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode='link']::before {
  content: '请输入链接地址:';
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: '保存';
  padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode='video']::before {
  content: '请输入视频地址:';
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: '14px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='small']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='small']::before {
  content: '10px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='large']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='large']::before {
  content: '18px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='huge']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='huge']::before {
  content: '32px';
}

.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: '文本';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='1']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='1']::before {
  content: '标题1';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='2']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='2']::before {
  content: '标题2';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='3']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='3']::before {
  content: '标题3';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='4']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='4']::before {
  content: '标题4';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='5']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='5']::before {
  content: '标题5';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='6']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='6']::before {
  content: '标题6';
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: '标准字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='serif']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='serif']::before {
  content: '衬线字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='monospace']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='monospace']::before {
  content: '等宽字体';
}


</style>
